Engine noise after AC evaporator core replacement.

NickN · 08-01-2018, 12:07 PM

Help! My 128i's evaporator core went out, so I had a trustworthy independent shop do the job. The whole dash had to be removed. When I got the car back, everything seems to work fine, but the car doesn't sound the same inside the cabin.

On startup, the starter motor sound was louder and tinnier than before, and driving it with some RPMs, I could hear more engine noise and almost a buzzing. The extra sound seems to be coming from the drivers side. Not imagining this as I've lived with the car for 6 years. It is present whether the climate control or radio are on and off. They said they never removed any sound deadening material during the process.

Desperate to try to find the answer so my car can be quiet again! Ideas? Thanks!

Thunderguts · 08-01-2018, 12:23 PM

I don't see any alternative. Either some sound deadening was mistakenly left out or maybe a firewall grommet is loose/missing.

NickN · 08-01-2018, 05:05 PM

Figured it out! Steering shaft boot came loose.

08-01-2018, 12:07 PM	#1
NickN Registered 3 Rep 2 Posts Drives: 2008 Bmw 128i Join Date: Apr 2013 Location: New Orleans iTrader: (0)	Engine noise after AC evaporator core replacement. Help! My 128i's evaporator core went out, so I had a trustworthy independent shop do the job. The whole dash had to be removed. When I got the car back, everything seems to work fine, but the car doesn't sound the same inside the cabin. On startup, the starter motor sound was louder and tinnier than before, and driving it with some RPMs, I could hear more engine noise and almost a buzzing. The extra sound seems to be coming from the drivers side. Not imagining this as I've lived with the car for 6 years. It is present whether the climate control or radio are on and off. They said they never removed any sound deadening material during the process. Desperate to try to find the answer so my car can be quiet again! Ideas? Thanks!
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08-01-2018, 12:23 PM	#2
Thunderguts Major 829 Rep 1,017 Posts Drives: 2009 128i Sport MT Join Date: Jul 2018 Location: DFW iTrader: (0)	I don't see any alternative. Either some sound deadening was mistakenly left out or maybe a firewall grommet is loose/missing.
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08-01-2018, 05:05 PM	#3
NickN Registered 3 Rep 2 Posts Drives: 2008 Bmw 128i Join Date: Apr 2013 Location: New Orleans iTrader: (0)	Figured it out! Steering shaft boot came loose.
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